CN218839064U

CN218839064U - Steering axle and balanced fork truck

Info

Publication number: CN218839064U
Application number: CN202223282525.8U
Authority: CN
Inventors: 黄弋豪; 于杰; 黄新林; 包金乐
Original assignee: LONKING (SHANGHAI) HYDRAULIC CO Ltd
Current assignee: LONKING (SHANGHAI) HYDRAULIC CO Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-11
Anticipated expiration: 2032-12-08

Abstract

The application relates to a steering axle and a balance forklift, wherein the steering axle comprises an axle body, a steering oil cylinder, a pin boss, a steering knuckle hub assembly, a main pin and a steering pull rod. Wherein the pontic has two limiting plates and two location axles, install respectively in the pontic both sides at two limiting plates for two location axles, it has the first installation cavity of open-ended to form between one of them limiting plate and the pontic, steering cylinder fixed mounting is inside first installation cavity, the both ends of this steering cylinder are the piston rod, install respectively at the pontic both ends at two key holders, inside has the rotation chamber that link up, and the key holder divide into first half and lower half, the interval has between the two, form the second installation cavity, knuckle wheel hub unit mount is in the second installation cavity, its inside has the pinhole the same with rotation cavity internal diameter, the swizzle passes rotation chamber and pinhole, steering linkage one end rotates with the piston rod to be connected, the other end rotates with knuckle wheel hub unit and is connected.

Description

Steering axle and balanced fork truck

Technical Field

The application relates to the technical field of steering axle equipment, in particular to a steering axle and a balance forklift.

Background

The steering axle refers to an axle that is responsible for steering, and is generally a front axle of an automobile, and in a four-wheel steering automobile, both the front axle and the rear axle are steering axles, and wheels at both ends of the steering axle are deflected by a certain angle by using a steering knuckle in the axle, so that the steering of the automobile is realized.

The balance forklift is a lifting vehicle with a lifting fork in the front of a vehicle body and a balance weight at the tail of the vehicle body and is used for loading, unloading, stacking and carrying finished articles. Because the steering operation of the balance forklift is frequent during loading and unloading work, and the characteristics of incapability of steering the front wheel, small turning radius, large limit turning angle, large load of the steering wheel and the like due to the steering of the rear wheel of the balance forklift are relatively high in requirements on the portability and the sensitivity of a steering axle, a steering axle body used by the conventional balance forklift is usually an I-shaped section solid beam formed by welding castings or steel plates. The steering axle body formed by the casting needs to be subjected to mould opening, the development period is long, and once casting defects occur, the component fails; the bridge body formed by welding the steel plates is light in weight, simple in process and wide in application.

However, in the conventional steering axle, the I-shaped section solid beam structure forms a closed box shape, so that a view blind area exists when the steering oil cylinder is installed, and extra time is spent on aligning the installation hole position; and after loading, if the oil cylinder needs to be disassembled or maintained, lifting equipment needs to be used or the oil cylinder can be realized in a professional working environment.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a steering axle and a balance forklift that need not to rise equipment or professional operational environment just can dismantle or maintain the hydro-cylinder, and dismouting efficiency is higher to aim at above-mentioned technical problem.

A steer axle, comprising:

the bridge body is provided with two limiting plates and two positioning shafts, the two limiting plates are respectively arranged on two sides of the bridge body, the two positioning shafts are respectively arranged on the two limiting plates, and a first installation cavity with an opening is formed between one limiting plate and the bridge body;

the steering oil cylinder is fixedly arranged in the first installation cavity, and piston rods are arranged at two ends of the steering oil cylinder;

the two pin bosses are respectively installed at two ends of the bridge body, a through rotating cavity is formed in each pin boss, each pin boss is divided into an upper half part and a lower half part, and a space is formed between each upper half part and each lower half part to form a second installation cavity;

the two knuckle hub assemblies are arranged in the second mounting cavity, and pin holes with the same inner diameter as the rotating cavity are formed in the two knuckle hub assemblies;

the two main pins penetrate through the rotating cavity and the pin holes and are used for fixing the axle body and the steering knuckle hub assembly;

and one end of each of the two steering pull rods is rotationally connected with the piston rod, and the other end of each of the two steering pull rods is rotationally connected with the steering knuckle hub assembly.

In one embodiment, the steering axle further comprises a limiting block, one end of the limiting block is fixedly installed on the axle body, the limiting block is provided with a through hole, and the limiting block is sleeved on the steering oil cylinder through the through hole.

In one embodiment, the bridge body, the pin seat and the limit plate are all made of low-alloy structural steel with tensile strength of more than 470Mpa and elongation of more than 22% through welding forming.

In one embodiment, a needle bearing, a dust ring and an O-shaped sealing ring are arranged in the rotating cavity.

In one embodiment, the outer race of the kingpin has an annular groove, and the O-ring seal is disposed within the annular groove.

In one embodiment, the bottom end of the upper half of the pin boss is provided with a flat bearing.

In one embodiment, a spacer is provided between the flat bearing and the knuckle hub assembly for controlling the clearance therebetween.

In one embodiment, oil cups are respectively mounted at two ends of the main pin, and oil outlets of the oil cups are communicated with the rotating cavity.

In one embodiment, the knuckle hub assembly is rigidly connected to the kingpin by fasteners.

In one embodiment, a counterbalanced forklift comprises the above-described steering axle.

Above-mentioned steering axle and balanced fork truck, the piston rod of steering cylinder is connected to tie rod one end, knuckle wheel hub subassembly is connected to one end, the three forms a crank block formula structure, knuckle wheel hub subassembly passes through the swizzle and installs in the second installation intracavity at pontic both ends, and with last, lower half key seat rotates and is connected, the pontic leaves the opening with the limiting plate of one side wherein, steering cylinder can follow opening part direct mount in first installation intracavity, and it is fixed with the pontic through the fastener, this application is for traditional steering axle, the dismouting steering cylinder's efficiency is higher, and need not to rise equipment or professional operational environment.

Drawings

FIG. 1 is a schematic illustration of a steer axle configuration according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a steer axle body according to an embodiment of the present application;

fig. 3 is a side view of a steering axle structure according to an embodiment of the present application.

In the figure: 100. a bridge body; 110. a limiting plate; 120. positioning the shaft; 130. a first mounting cavity; 140. a limiting block; 200. a steering cylinder; 210. a piston rod; 300. a pin boss; 310. a second mounting cavity; 320. a rotation chamber; 400. a knuckle hub assembly; 500. a kingpin; 600. a steering tie rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The use of the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like in the description of the present application is for purposes of illustration only and is not intended to represent the only embodiment.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, as shown in fig. 1, a steer axle comprises: the axle body 100, the steering cylinder 200, the pin boss 300, the knuckle hub assembly 400, the kingpin 500, and the tie rod 600. The bridge body 100 is provided with two limiting plates 110 and two positioning shafts 120, the two limiting plates 110 are respectively installed on two sides of the bridge body 100, the two positioning shafts 120 are respectively installed on the two limiting plates 110, and the positioning shafts 120 are used for being connected with the whole bridge body to play a supporting role. A first mounting cavity 130 with an opening is formed between one of the limiting plates 110 and the axle body 100 and is used for mounting the steering cylinder 200. Compared with the conventional steering cylinder 200, the limiting plate 110 and the axle body 100 of the present embodiment do not form a sealed box structure therebetween. The steering cylinder 200 enters the first mounting cavity 130 from the openings of the two and is fixed with the bridge body 100 through a fastener, and the two ends of the steering cylinder 200 are provided with piston rods 210. The pin bosses 300 are fixed to both ends of the axle body 100, and have a through rotation cavity 320 therein, the pin bosses 300 are divided into an upper half and a lower half with a space therebetween to form a second mounting cavity 310 for mounting the knuckle hub assembly 400, the knuckle hub assembly 400 has a pin hole having the same inner diameter as the rotation cavity 320 therein, and the kingpin 500 passes through the rotation cavity 320 and the pin hole for fixing the axle body 100 and the knuckle hub assembly 400. The tie rod 600 has one end rotatably connected to the piston rod 210 of the steering cylinder 200 and the other end rotatably connected to the knuckle hub assembly 400.

Above-mentioned steer axle, piston rod 210 of steering cylinder 200 is connected to steering linkage 600 one end, knuckle wheel hub subassembly 400 is connected to one end, the three forms a crank block formula structure, knuckle wheel hub subassembly 400 passes through kingpin 500 to be installed in the second installation cavity 310 at pontic 100 both ends, and with upper and lower half key seat 300 rotate to be connected, pontic 100 leaves the opening with the limiting plate 110 of one side wherein, steering cylinder 200 can follow opening part direct mount in first installation cavity 130, and fixed with pontic 100 through the fastener, this application is for traditional steer axle, dismouting steering cylinder 200's efficiency is higher, and need not to rise equipment or professional operational environment.

In this embodiment, the steering axle further includes a limiting block 140, one end of the limiting block 140 is fixedly mounted on the axle body 100, and the limiting block 140 has a through hole and is sleeved on the steering cylinder 200 through the through hole. Specifically, the limiting block 140 is fitted and sleeved on the steering cylinder 200, and then fixed with the axle body 100 through a fastening member, and the movement direction of the steering cylinder 200 is further limited through the limiting block 140 to prevent the loosening thereof.

In this embodiment, the bridge 100, the pin holder 300, and the limiting plate 110 are all made of low-alloy structural steel with a tensile strength greater than 470Mpa and an elongation greater than 22%. Specifically, the steering axle can be formed by welding low-alloy structural steel with the tensile strength larger than 470Mpa and the elongation larger than 22% such as an S355JR steel plate and a Q355ND steel plate. Compared with a steering axle formed by a casting, the welded axle body 100 is light in weight, simple in process and wide in application. And the mould opening is not needed, the manufacturing time is saved, and the complex working condition of the forklift is better met.

In the present embodiment, a needle bearing, a dust seal ring and an O-ring are disposed in the rotating cavity 320. In particular, a needle bearing which is more suitable for a supporting structure with limited radial installation size is adopted, and the load bearing capacity is improved. By using the dust seal ring and the O-ring in combination, the sealing performance is improved while preventing external dust from being mixed into the rotating chamber 320.

In this embodiment, the outer race of the kingpin 500 has an annular groove in which an O-ring seal is disposed. Specifically, through making the O shape sealing washer block in the annular groove, can prevent that the O shape sealing washer from sliding at the during operation, causing the part disappearance.

In this embodiment, the bottom end of the upper half of the pin holder 300 is provided with a flat bearing. Specifically, the plane bearing is arranged at the joint of the pin boss 300 and the knuckle hub assembly 400, so that the movable connection effect of shock absorption and a vehicle body can be achieved, damage caused by direct friction between the pin boss and the vehicle body is avoided, and the service life of a steering axle is prolonged.

In this embodiment, a spacer is provided between the flat bearing and the knuckle hub assembly 400 for controlling a gap therebetween. Specifically, the shims provide a cushioning effect between the flat bearing and the knuckle hub assembly 400, prevent wear, and enable clearance adjustment.

In this embodiment, oil cups are respectively installed at both ends of the main pin 500, and oil outlets of the oil cups are communicated with the rotating chamber 320. Specifically, the oil level of the lubricating oil in the rotating chamber 320 is kept constant by the oil cup, and the rotating chamber 320 can be automatically replenished with oil under the action of atmospheric pressure.

In this embodiment, the knuckle hub assembly 400 is rigidly connected to the kingpin 500 by fasteners. Specifically, rigid connection refers to a connection between two members, when one member is displaced or stressed, the other member connected with the other member is not displaced or deformed relative to the first member, and by rigidly connecting the fastening member and the main pin 500, the two members can be ensured to rotate together around the rotating cavity 320, and the steering sensitivity is improved.

In this embodiment, a counterbalanced forklift includes the steer axle of any of the above embodiments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A steer axle, comprising:

the two steering knuckle hub assemblies are arranged in the second mounting cavity, and pin holes with the same inner diameter as the rotating cavity are formed in the two steering knuckle hub assemblies;

2. The steering axle according to claim 1, further comprising a limiting block, wherein one end of the limiting block is fixedly mounted on the axle body, the limiting block is provided with a through hole, and the limiting block is sleeved on the steering oil cylinder through the through hole.

3. The steering axle of claim 2, wherein the axle body, the pin boss and the limit plate are all formed by welding low-alloy structural steel with the tensile strength of more than 470Mpa and the elongation of more than 22%.

4. The steer axle of claim 3 wherein said pivot chamber is provided with a needle bearing, a wiper seal and an O-ring seal.

5. The steer axle of claim 4 wherein said kingpin outer race has an annular groove, said O-ring seal being disposed within said annular groove.

6. The steer axle of claim 5 wherein said pin boss upper half is provided with a flat bearing at a bottom end thereof.

7. The steer axle of claim 6 wherein a shim is provided between said flat bearing and said knuckle hub assembly for controlling clearance therebetween.

8. The steering axle of claim 7, wherein oil cups are respectively mounted at two ends of the main pin, and oil outlets of the oil cups are communicated with the rotating cavity.

9. The steer axle of claim 8 wherein said knuckle hub assembly is rigidly connected to said kingpin by a fastener.

10. A counterbalanced forklift truck comprising a steer axle according to any of claims 1 to 9.